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Патент USA US3057287

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Oct. 9, 1962
Filed June 50, 1960
2 Sheets-Sheet 1
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Oct. 9, 1962
Filed June so, 1960
2 Sheets-Sheet 2
Unite States Patent
Walter Swarofsky, Braunschweig, and Dietrich Bluhm,
Braunschweig-Volkmarode, Germany, assignors to
Voigtlander A.G., Braunschweig, Germany, a corpora
tion of Germany
Filed June 30, 1960, Ser. No. 39,877
Claims priority, application Germany July 2, 1959
10 Claims. (Cl. 95-31)
This invention relates to frame or picture counters
for photographic cameras and, more particularly, to an
Patented Oct. 9, 1962
particularly, in accordance with the present invention
a scale carrier having a single scale is cooperable with at
least two different relatively ?xed reading points or in
dicator positions determined by reading marks, and only
one indicator position at a time is operable.
In a preferred arrangement, at least two stationary in
dicators are associated with the movable scale carrier
and these two marks, in the initial position of the scale
carrier and during the movement thereof, point to dif
10 ferent scale values. A cover means is provided and is
adjustable to expose one indicator at a time and to block
view of the other indicator.
In a further embodiment of the invention, a graduated
ring is arranged coaxially with the rotatable scale carrier,
improved and simpli?ed means for indicating the number
of pictures remaining upon a ?lm and useable with ?lms 15 and this ring carries an indicator which, by adjustment
of the graduated ring, can be arranged at diiferent ?xed
of different lengths having different numbers of frames
points along the scale carrier. An adjusting handle is
or pictures available.
provided for the graduated ring.
In a known prior art picture or frame counter, the
The invention arrangement can be applied to ?lm or
scale carrier is moved in the counter direction against
the force of a return spring. This return spring, upon 20 picture counting devices of various designs and con
structions but in which the scale carrier, when released
opening the back wall of the camera, automatically re
is always returned to the same starting position, this
turns the scale carrier to its initial or starting position.
release being effected by the opening of the back wall of
However, frame or picture counters of this type can be
the camera.
used only with ?lms having the same number of picture
For an understanding of the principles of the inven
tion, reference is made to the following description of
Frame counters which are to be used with ?lms of
typical embodiments thereof as illustrated in the ac
varying length must start from a position corresponding
companying drawings. In the drawings:
to the scale value in turn corresponding to the number
FIG. 1 is a bottom plan view of a photographic camera
of frames on the particular ?lm. In other words, their
initial setting must be at the beginning of the scale cor 30 provided with a ?lm feed lever and a ?lm counting
mechanism in accordance with the present invention;
responding to a particular length ?lm, and thus these
FIG. 2 is a bottom plan view of the ?lm counting
frame counters must operate from different initial or
mechanism, with the bottom surface of the camera being
starting position. The starting position in each instance
broken away and the ?lm feed lever being omitted;
must be selected by corresponding adjustment of the
counting disk, and it has not been possible to provide for 35 FIG. 3 is a sectional view, on a relatively enlarged
scale, taken on the line III-III of FIG. 2; and
automatic return of the scale counter or counting disk
FIG. 4 is a view similar to FIG. 1 illustrating a modi
to the same initial starting position, such return needing
?ed form of the invention.
to be effected manually. If, when the ?lm is placed in
Referring ?rst to the embodiment of the invention
the camera, the counting disk or scale carrier is not ad
justed to a starting position corresponding for the par 40 shown in FIGS. 1, 2, and 3, the camera casing is illustrat
ed as having a bottom wall 1 to which a back wall is
ticular number of pictures on the inserted ?lm, or is
hinged by means of a hinge 2, the back wall 3 being
incorrectly adjusted, the ?lm or frame counter will read
shown in closed position. A ?lm feed lever 4 is mounted
incorrectly and this may result in loss of available pic
on the bottom wall 1 and is capable of being oscillated.
It is also known in cameras, provided with frame 45 A ratchet wheel 6 is non-rotatably secured to the shaft 5
of lever 4, and a pawl 7 cooperable with ratchet wheel 6 is
counters which indicate the number of pictures or frames
oscillatably mounted on a spur gear 8 freely rotatable
already exposed, to move the frame counter against
on shaft 5. The parts 6, 7, and 8 form a conventional
the force of a returning spring and to operate locking
one-way coupling so that, when ?lm feed lever 4 is oscil
means, preventing return movement of the frame counter,
in dependence upon the opening and closing of the 50 lated, spur gear 8 will be moved in one direction only.
Gear 3 rotates, through intermediate gears 9, a pinion or
camera back wall. In the closed position of the back
pin Wheel 10 engaging the perforations of ?lm 11 (FIG.
wall, this locking means is rendered effective and, when
2) so that the ?lm is advanced while it is simultaneously
the back wall is opened, the locking means is rendered
‘wound on a ?lm pick-up spool 12 freely rotatable on
ineffective or released so that the frame counter may
be returned by its spring to its initial or starting position. 55 shaft 5.
Pinion or pin wheel 10 is secured to a shaft 13 which
In another known type of frame or picture counter,
extends through a partition 14 and has secured to its
the viewing window is adjustable with respect to» varying
other end a gear 15. Through an idler gear 16, gear
sizes of frames or pictures. Thus, depending upon the
15 drives a spur gear 17. The transmission ratio of
selective size of the frame on the ?lm, different numbers
of pictures can be exposed on ?lms of the same length. 60 gears 8, 9, 15, 16, and 17 is so selected that, during a
single oscillation of ?lm feed lever 4, ?lm 11 is trans
The scale disk of the counting mechanism, in this case,
ported by the length of one image area or frame, and
carries several scales which have divisions corresponding
with spur gear 17 making one-half a revolution. During
to the different lengths of the frames or pictures. A
this one-half revolution of gear 17, one of a pair of dia
cover plate is placed over the scale disk and has a window
metrically opposite pins 18 thereon engages a control
coordinated with each scale, and this cover disk is ad 65 lever 19 or pawl in the path of movement of pins 18.
justable so that only the scale corresponding to the par
Lever 19 has an elongated slot 20 therein receiving a
ticular image or frame size is exposed.
bolt 21 fastened on partition 14, and is normally biased
In accordance with the present invention, a frame or
in a direction away from a ratchet wheel 24 by a spring
picture counter is provided which is adjustable in ac 70 22. Lever 19 is thus slidable and oscillatable relative to
cordance with different numbers of frames of a ?lm and
pin or bolt 21.
is always started from the same initial position. More
In each oscillation of pawl 19, resulting from a half
revolution of gear 17, a pin \18, striking the pawl 19
moves the latter in such a direction that its tooth or
nose 23 engages and advances ratchet wheel 24 to move
adjusted to a ?lm having 20 picture frames or areas. If
a ?lm having this number of picture areas or frames is
inserted into the camera, and if the back wall is then
closed and that part of the ?lm which has been exposed
during insertion of the ?lm is wound onto spool 12 by
two strokes of lever 4, the scale value 20 will be located
opposite the reading mark 43. This means that twenty
the latter by the distance between adjacent teeth in the
direction of arrow 25. This movement is eifected against
the tension of spring 26 acting on the ratchet wheel 24
and tending to move this ratchet wheel in a direction
opposite to the direction of motion imparted to it by the
picture areas on the ?lm are available for exposure.
On the other hand, if the camera is charged with
lever 19.
Reverse movement of ratchet wheel 24 is prevented by 10 the ?lm having thirty-six picture areas, upon insertion of
this ?lm into the camera the cover disk 42 is displaced
a pawl 27 spring biased to engage the teeth of the ratchet
to its other extreme position shown in FIG. 1 by broken
wheel. Pawl '27 is oscillatable about a bolt 28 on a lever
lines. In this other extreme position, window 41 is closed
29, and lever 23 is also oscillatably mounted on a bolt
so that the numeral “36” on the disk 42 is visible and
30 fastened in partition 14. A spring 31, engaged with
a pin or bolt 28 on lever 29, tends to move or oscillate 15 this means that the counting mechanism is adjusted to a
?lm having this number of picture areas. Conversely,
lever 29 in a direction toward camera back wall 3. How
reading window 411 will be opened and the reading mark
ever, this same ‘spring 31 holds pawl 27 resiliently engaged
38, the end point of the scale, and the scale of disk 37
with a tooth of ratchet wheel 24, by virtue of the spring
starting with the value “36” are visible.
31 engaging a pin 32 on the pawl 27.
In the embodiment illustrated in FIG. 4, the bottom
In the range of oscillatory movement of lever 29, the 20
wall of the camera is again indicated at 1 as carrying the
camera back wall 3 carries a projection 33 which holds
scale disk 37 of the ?lm counting mechanism. The con
the parts in the position shown in FIG. 2 when the camera
struction of the ?lm counting mechanism can be the same
back wall 3 is closed. When back wall 3 is opened,
as that shown in FIGS. 1, 2 and 3 or can differ there
spring 31 moves lever 29 and, by means of a lug 34 on
lever 29, the pawl 27 in a direction such that the latter 25 from. However, the operation of the ?lm counting
mechanism is essentially equal to that described in con
disengages ratchet wheel 24 and this wheel is turned in
nection with FIGS. 1, 2, and 3, in any case. Thus, scale
a reverse direction by the tensioned spring 26 to return
disk 37 always starts at an identical initial position and
the ratchet wheel to an initial starting position.
always operates against the force of a return spring to
As best seen in ‘FIG. 3, ratchet Wheel 24 is ?xed to a
indicate the supply of ?lm remaining.
ring 35 which is rotatable about a sleeve or bushing 36
In this embodiment of the invention, the scale disk
extending through partition 14 and forming a bearing for
is overlapped by a cap 46 provided with an arcuate win
shaft 5. Also secured to sleeve 35 is an annular scale
dow 47, in place of the ?lm lever 4 of FIGS. 1, 2, and 3.
disk 37 of the ?lm counter. Disk 37 is cooperable with
A graduated ring ‘48 is rotatably arranged in the cap 46
a pair of indicators 38‘ and 39 (FIG. 2) mounted on
partition '14, and with two reading windows 40 and 41 35 and has an indicator 49 pointing to the scale of disk
‘37 and an adjusting handle 50 projecting from cap 46.
formed in the ?lm feed lever 4. Mounted inside the ?lm
The bottom wall 1 of the camera carries both ?gures
feed lever 4 is a cover disk 42 having ‘an adjusting han
“20” and “3 6.” ‘In the position shown in FIG. 4, symbol
dle 43 projecting from lever 4. Disk 42 is held in posi
“36” is covered by adjusting handle 51} while symbol
tion by a snap ring 44. This disk is generally circular
but it is formed with an arcuate peripheral recess or 40 “20” is visible, and this indicates that the counting device
isadjusted with respect to a ?lm supply having twenty
notch 45 and has imprinted thereon two numerical sym
picture areas. The parts are shown in a position in which
bols “20” and “36” positioned in such a manner that, in
the inserted ?lm has been advanced to the ?rst picture to
one of its extreme positions, disk 42 blocks one of the
be exposed. The position of the adjusting lever 50 and of
windows 40‘ and 41 so that one of the numerical symbols
the indicator 49 when adjusted to a ?lm having thirty-six
“20” or “36” is visible through this blocked window,
.picture' areas is indicated by the broken lines. Thus, in
while in the other extreme position of disk 42, the other
accordance with the number of pictures in the ?lm being
reading window 41 or 40 is similarly blocked by the disk
used, the adjusting handle 50, and with it the indicator
and the corresponding other information or symbol “36”
49, are correspondingly adjusted. The parts are releas
or “20” can be viewed through this window.
The two extreme positions of cover disk ‘42 can be de 50 ably retained in adjusted position by any suitable release
able latch means.
termined by any suitable means, for example by two cam
“From the foregoing, it will be apparent that the counting
portions extending or pressed out from the cover disk and
disk or scale carrier can be arranged in any desired posi
engaging a notch or recess in the ?lm feed lever. In one
tion on the camera, such as within a ?lm feed lever or
of the windows 40 or 41 open in a particular instance,
the numerical data of the scale disk 37 and, when the ?lm 55 it may be separated from a ?lm feed lever and mounted
‘on another portion of the camera. The ?lm ‘feed lever
feed lever is in its rest position, an indicator 38 or 39 cor
responding to the particular window position is visible.
The divisions of scale 37 correspond to the pitch of
ratchet wheel 24 so that, ‘at each image step, the scale
is moved by one division relative to the reading marks 60
38 and 39. The scale is arranged in such a manner that
can also be an adjusting button which is moved in one
direction of rotation only. Furthermore, by a correspond‘
ing arrangement of the indicators, counting of the ?lm
supply can be started at values other than “20” or “36”
which are given above solely as examples.
While speci?c embodiments of the invention have
been shown and described in- detail to illustrate the ap
it indicates the number of image or picture areas, or
frames,,which are still available for exposure in a particu
plication of the principles of the invention, it will be
lar case, and will indicate, the value “zero” when the last
picture area or frame of a ?lm is disposed in the picture 65 understood that the invention may be embodied other
'window of a camera.
When a ?lm is inserted into the camera, at the com
'mencement of the opening movement of back wall 3, the I
ratchet wheel 24, and with it the holder 35 and scale disk
37, are biased by spring 26 back to the starting position. 70
As illustrated in FIG. 1, opposite the indicator 39 visible
through the window 41, a point below the scale value
“22” may be noted. Window 40 is closed by the cover
wise without departing from such principles.
What is claimed is:
1..In a photographic camera of the type including a
casing having an openable wall, ?lm feed mechanism, a
picture frame counter movable in a selected direction by
the mechanism, in advancing the ?lm, spring means con—
'nected to the counter and biasing it to move in the re
verse direction to return to a ?xed starting point, and
disk 42 and this exposes the symbol “20” on the cover
latch means operatively associated with the openable Wall
disk- This meansthat the counting mechanism is then 75 and released upon opening of the latter, the latch means,
when the wall is closed, engaging the counter and in
hibiting such reverse movement thereof: the improve
ment comprising a scale carrying member movable with
said counter and having a single scale in which successive
scale graduations correspond to successive picture frames
and the total number of graduations corresponds to the
maximum possible number of picture frames on any ?lm
useable in the camera; plural indicator positions associated
with said scale carrying member ‘and spaced longitudi
4. In a photographic camera as claimed in claim 1, re
leasable means for latching said screening element in each
of its adjusted positions.
5. In a photographic camera as claimed in claim 3,
said ?lm feed mechanism including an oscillatable ?lm
feed handle coaxial with said scale carrying disk.
6. In a photographic camera as claimed in claim 5,
said circular cover forming a portion of said ?lm feed
handle; said screening element having an operating por
nally of the scale thereon; plural ?lm length symbols, 10 tion projecting radially beyond said cover.
corresponding, respectively, to the total number of picture
7. In a photographic camera as claimed in claim 1, an
frames on ?lms of different lengths, operatively associated
indicator movable relative to said scale between said indi
with said member and spaced longitudinally of the scale
cator positions.
thereon, said symbols being equal in number to the num
8. In a photographic camera as claimed in claim 1,
ber of said indicator positions; and a screening element 15 said scale carrying member being a rotatable substantially
movable parallel to said scale carrying member to se
circular disk; and a ring forming said screening element
lected positions in each one of which said element ex
and coaxially embracing said scale carrying disk, said
poses an indicator at only one of said indicator positions
ring having an indicator cooperable with said scale and
and exposes only a selected one of said symbols at an
an adjusting handle projecting radially therefrom.
other indicator position.
9. In a photographic camera as claimed in claim 8,
2. In a photographic camera as claimed in claim 1, a
said scale carrying disk being mounted on another wall of
cover device overlying said scale carrying member and
said casing; said symbols being applied to said wall and
formed with window means exposing said indicator posi
there being a pair of symbols each speci?c to a particular
length of ?lm; the symbol corresponding to the length
3. In a photographic camera as claimed in claim 1, 25 of ?lm not then being used in the camera being covered
said scale carrying member being a rotatable substantially
circular disk; a circular cover overlying said disk and
formed with a pair of circumferentially spaced arcuate
windows each exposing one of said indicator positions;
by said adjusting handle when said indicator is moved to
the proper position for coordinating said scale carrying
disk with the length of ?lm then in the camera.
10. In a photographic camera as claimed in claim 8,
said screening element being a circular disk disposed be 30 means releasably arresting said ring in each of its ad
tween said cover and said scale carrying disk and oscilla
table about the axis of said scale carrying disk; said
screening element having an arcuate notch extending
around part of its periphery and of such a length that
when ‘said notch exposes the indicator position beneath 35
one of said windows, said screening element will block
the other of said windows; said screening element hav
ing said symbols printed thereon at each end of said notch
and arranged to be exposed through said windows when
said screening element is blocking a particular window;
and a ?xedly positioned indicator at each of said indicator
justed positions.
References Cited in the ?le of this patent
Allderige ___________ __ Aug. 14, 1888
Wells _________________ __ Mar. 14,1916
Yoshiharu Sago et a1, ___Mar. 29, 1960
Bundschuh et al ________ __ May 17, 1960
Germany _____________ __ May 11, 1934
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